After a bunch of research and stealing ideas through these forums and others I finally finished (well is anything ever really finished?) my Shapeoko 4 XL enclosure build!
The base is 4x4s and 2x4s that I milled down a little and on heavy duty leveling feet. I then built a torsion box top out of MDF for the machine to sit on and framed the top portion with milled 2x4s again. Below I drywalled inside and out with acoustic ceiling panels in between for sound absorption and sealed all joints with green glue. On top the inside layer is MDF for durability and drywall outside with acoustic panels inside as well. I wired it via extension cord plugged into a wall outlet and ran wires within the enclosure wall to various outlets that are controlled via the custom switch panel I made and wired in an E-Stop. My shop vac sits below with a cyclone separator and runs up the side where I can divert vacuum to either the machine or a sweep hose. It has recessed lighting, a ring camera to view if I need to go inside to do something so I can keep watching it, and the shop vac can turn on independently or if I switch on the router. The dryer vent in the back is to allow airflow to enter for proper vacuum.
I’m sure people will ask about maintenance and enough area to work. It seems adequate as of now and if anything I can pull it out and slide it onto another table I have if I need to conduct serious changes. I didn’t put a whole lot of effort into the drywall finish work or painting because I was mostly concerned with functionality over looks but I think it looks good enough.
Let me know your thoughts!!